Malmstadt, Howard V.
Control of electrical quantities in instrumentation
W.A. Benjamin, 1973
 Buku Teks
Hazeu, H.A.G.
Fifty years of electronic components 1921-1971
N.V. Philips Gloeilampenfabrieken, 1971
 Buku Teks SO
IEEE recommended practice for protection and coordination of industrial and commercial power systems / sponsor, Industrial and Commercial Power Systems Committee of the IEEE Industry Applications Society
Institute of Electrical and Electronics Engineers, 1975
 Buku Teks SO
Namgostar, M.
Digital equipment troubleshooting / M. Namgostar
Reston Publishing, 1977
 Buku Teks
Beach, David P.
Industrial control electronics
Prentice-Hall, 1990
 Buku Teks SO